Stephen D. Krashen Stephen D. Krashen is emeritus professor of education at the University of Southern California, Los Angeles. He is best known for his work in establishing a general theory of second language acquisition, as the cofounder of the Natural Approach, and s the inventor of sheltered subject matter teaching. He is the author of numerous books, including Three Arguments Against Whole Language and Why They Are Wrong (1999), Every Person a Reader: An Alternative to the California Task Force Report on Reading (1997), and Under Attack: The Case Against Bilingual Education (1997), all available from Heinemann. Read More Read Less